Question

alguém sabe resolver?

Answer 1

7^ -9x+1=49^ -12 49=7^2

7^-9x+1=7^-12+2 corta os setes

-9x+1=-12+2 passa o1pro outro lado

-9x+1=-10

-9x=-10-1

-9x=-11

-x= -11/9 ×(-1)

x=11/9